package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.awt.datatransfer.FlavorMap;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应口味数据
     * @Transactional 设置事物 保证方法原子性 全成功或者全失败
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        //不用传入DishDTO 里面包含了其他数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //插入一条数据到dish表
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        //向口味插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size()>0) {

            //插入菜品id到口味数据中
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开启分页
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {

      //判断是否存在起售中的菜品
        for (Long id : ids){
            Dish dish =dishMapper.getById(id);
            if ((dish.getStatus() == StatusConstant.ENABLE)){
                //当前菜品处于起售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

      //判断是否有关联的套餐
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if ((setmealIdsByDishIds != null&&setmealIdsByDishIds.size()>0)){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品和口味的关联数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        dishMapper.deleteBatch(ids);
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {

        Dish dish = dishMapper.getById(id);

        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();

        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Transactional
    @AutoFill(value = OperationType.UPDATE)
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品基本数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.update(dish);
        //删除原口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //添加新口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null&& flavors.size() > 0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 启用禁用套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品和对应的口味
     * @param categoryId
     * @return
     */
    @Transactional
    public List<DishVO> getByCategoryIdWithFlavor(Long categoryId) {

        log.info("根据分类id查询菜品：{}",categoryId);
        // 查询当前分类下的菜品数据
        List<Dish> dishList = dishMapper.getByCategoryId(categoryId);

        //封装到DishVO，只能单个赋值不能数组赋值
        List<DishVO> dishVOList = new ArrayList<>();
        for (Dish dish : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(dish, dishVO);
            dishVOList.add(dishVO);
        }

        for (DishVO dishVO : dishVOList){
            dishVO.setFlavors(dishFlavorMapper.getByDishId(dishVO.getId()));
        }

        return dishVOList;

    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
